<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        class Father {
            constructor(name, age) {
                this.Fname = name;
                this.Fage = age;
            }
        };
        class Son extends Father {
            constructor(sname, name, age) {
                super(name, age)
                this.Sname = sname;
            };
        };
        var son1 = new Son('连浩伟', '镇', 63);
        console.log(son1);
    </script>
</body>

</html>